1660556105 has 8 divisors (see below), whose sum is σ = 2145949512. Its totient is φ = 1226256768.

The previous prime is 1660556087. The next prime is 1660556123. The reversal of 1660556105 is 5016550661.

It is an interprime number because it is at equal distance from previous prime (1660556087) and next prime (1660556123).

It can be written as a sum of positive squares in 4 ways, for example, as 29365561 + 1631190544 = 5419^2 + 40388^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1660556105 - 2⁸ = 1660555849 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12773444 + ... + 12773573.

It is an arithmetic number, because the mean of its divisors is an integer number (268243689).

Almost surely, 2^1660556105 is an apocalyptic number.

It is an amenable number.

1660556105 is a deficient number, since it is larger than the sum of its proper divisors (485393407).

1660556105 is a wasteful number, since it uses less digits than its factorization.

1660556105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25547035.

The product of its (nonzero) digits is 27000, while the sum is 35.

The square root of 1660556105 is about 40749.9215336668. The cubic root of 1660556105 is about 1184.1803526796.

It can be divided in two parts, 1660556 and 105, that added together give a palindrome (1660661).

The spelling of 1660556105 in words is "one billion, six hundred sixty million, five hundred fifty-six thousand, one hundred five".